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.Management Sciences
Category: Machine Design
Stress concentration is caused due to_____________________?
A. variation in properties of material from point to point in a member
B. pitting at’points or areas at which loads on a member are applied
C. abrupt change of section
D. all of the above
E. none of the above
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________?
A. Brinell
B. Rockwell
C. Vicker
D. Shore’s sceleroscope
E. none of the above
In oilness bearings________________?
A. the oil film pressure is generated only by the rotation of the journal
B. the oil film is maintained by supplying oil under pressure
C. do not require external supply of lubricant
D. grease required to be applied after some intervals
E. none of the above
The fatigue limit of a material____________________?
A. is greatly decreased by poor surface conditions
B. remains same irrespective of surface conditions
C. depends mainly on core composition
D. is dependent upon yield strength of material
E. none of the above
Taper on the cotter and slot is provided_________________?
A. on both the sides
B. on one side only
C. on none of the sides
D. may be provided anywhere
E. none of the above
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at_______________?
A. shank
B. head
C. in the middle
D. at the thread
E. anywhere in the bolt
Spring stiffness is__________________?
A. ratio of coil diameter to wire diameter
B. load required to produce unit deflection
C. its capability of storing energy
D. its ability to absorb shocks
E. none of the above
Which process will increase the fatigue duration of parts ?
A. finishing and polishing
B. shot-peening
C. decarburisation
D. electroplating
E. all of the above”.
An alien bolt is___________________?
A. self locking bolt
B. same as stud
C. provided with hexagonal depression in head
D. used in high speed components
E. provided with countersunk head
The valve rod in a steam engine is connected to an eccentric rod by_________________?
A. cotter joint
B. bolted joint
C. kunckle joint
D. universal coupling
E. gib and cotter joint
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